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Dome-like PVDF Actuators: Preparation, Phase Transformation and Piezoelectric Properties

  • Michael Wegener (a1), Robert Schwerdtner (a2), Martin Schueller (a3) and Andreas Morschhauser (a4)

Abstract

In this work, dome structures in PVDF films were prepared as ultrasonic transducer. The domes are realized by a deep-drawing process. The dome-forming process leads to a phase transformation from the non-polar α into the polar β phase within dome wall and roof of the PVDF films. A ferroelectric polarization is obtained in these dome areas after suitable electrical poling which yields a piezoelectric activity. Because of the piezoelectric activity within the film plane, a dome-roof up-and-down actuation is observed with resonance frequencies in the range between 65 and 93 kHz.

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Dome-like PVDF Actuators: Preparation, Phase Transformation and Piezoelectric Properties

  • Michael Wegener (a1), Robert Schwerdtner (a2), Martin Schueller (a3) and Andreas Morschhauser (a4)

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